Yes, Donald Trump did say he now had the tallest building in lower Manhattan on 9/11/2001.

"It was an amazing phone call," said Donald Trump on September 11, 2001, speaking to a reporter from UPN 9 (now WWOR-TV) about how he found out about the terror attacks that morning. Obviously, the word amazing doesn't have to be positive, but it was what he said next, when asked whether his building at 40 Wall Street took any damage, that went viral 15 years later on the anniversary of the attack:

Here's the disgusting audio of Trump on 9/11 bragging about how his building is now the tallest in Lower Manhattan: pic.twitter.com/4ufikWwOom

Reporter: "Now, you have one of the landmark buildings down in the financial district, 40 Wall Street. Uh, did you have any damage, or did, what's happened down there?"

Trump: "Well, it was an amazing phone call, and 40 Wall Street actually was the second-tallest building in downtown Manhattan. And it was, actually, before the World Trade Center it was the tallest. And then when they built the World Trade Center it became known as the second-tallest, but now it's the tallest."

Many people are, of course, baffled and offended by his reaction. Not least because 40 Wall Street was NEVER the second-tallest building in Lower Manhattan. There were two Twin Towers, after all.